bio_split (9) Linux Manual Page
bio_split – split a bio
Synopsis
struct bio *bio_split(struct bio *bio, int sectors, gfp_t gfp, struct bio_set *bs);Arguments
bio
-
- bio to split
sectors
- number of sectors to split from the front of bio
gfp
- gfp mask
bs
- bio set to allocate from
Description
Allocates and returns a new bio which represents sectors from the start of bio, and updates bio to represent the remaining sectors.
Unless this is a discard request the newly allocated bio will point to bio‘s bi_io_vec; it is the caller’s responsibility to ensure that bio is not freed before the split.